1 files changed, 148 insertions, 0 deletions
diff --git a/include/vcl/BitmapInfoAccess.hxx b/include/vcl/BitmapInfoAccess.hxx
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+++ b/include/vcl/BitmapInfoAccess.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_BITMAPINFOACCESS_HXX
+#define INCLUDED_VCL_BITMAPINFOACCESS_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/bitmap.hxx>
+#include <vcl/Scanline.hxx>
+#include <vcl/BitmapBuffer.hxx>
+#include <vcl/BitmapColor.hxx>
+#include <vcl/BitmapAccessMode.hxx>
+
+bool Bitmap32IsPreMultipled();
+
+typedef BitmapColor (*FncGetPixel)(ConstScanline pScanline, tools::Long nX, const ColorMask& rMask);
+typedef void (*FncSetPixel)(Scanline pScanline, tools::Long nX, const BitmapColor& rBitmapColor,
+                            const ColorMask& rMask);
+
+class VCL_DLLPUBLIC BitmapInfoAccess
+{
+    friend class BitmapReadAccess;
+
+public:
+    BitmapInfoAccess(Bitmap& rBitmap, BitmapAccessMode nMode = BitmapAccessMode::Info);
+    virtual ~BitmapInfoAccess();
+
+    bool operator!() const { return mpBuffer == nullptr; }
+
+    tools::Long Width() const { return mpBuffer ? mpBuffer->mnWidth : 0L; }
+
+    tools::Long Height() const { return mpBuffer ? mpBuffer->mnHeight : 0L; }
+
+    bool IsTopDown() const
+    {
+        assert(mpBuffer && "Access is not valid!");
+
+        return mpBuffer && (mpBuffer->mnFormat & ScanlineFormat::TopDown);
+    }
+
+    bool IsBottomUp() const { return !IsTopDown(); }
+
+    ScanlineFormat GetScanlineFormat() const
+    {
+        assert(mpBuffer && "Access is not valid!");
+
+        return mpBuffer ? RemoveScanline(mpBuffer->mnFormat) : ScanlineFormat::NONE;
+    }
+
+    sal_uInt32 GetScanlineSize() const
+    {
+        assert(mpBuffer && "Access is not valid!");
+
+        return mpBuffer ? mpBuffer->mnScanlineSize : 0;
+    }
+
+    sal_uInt16 GetBitCount() const
+    {
+        assert(mpBuffer && "Access is not valid!");
+
+        return mpBuffer ? mpBuffer->mnBitCount : 0;
+    }
+
+    BitmapColor GetBestMatchingColor(const BitmapColor& rBitmapColor) const
+    {
+        if (HasPalette())
+            return BitmapColor(static_cast<sal_uInt8>(GetBestPaletteIndex(rBitmapColor)));
+        else
+            return rBitmapColor;
+    }
+
+    bool HasPalette() const
+    {
+        const BitmapBuffer* pBuffer = mpBuffer;
+
+        assert(pBuffer && "Access is not valid!");
+
+        return pBuffer && !!pBuffer->maPalette;
+    }
+
+    const BitmapPalette& GetPalette() const
+    {
+        const BitmapBuffer* pBuffer = mpBuffer;
+
+        assert(pBuffer && "Access is not valid!");
+
+        return pBuffer->maPalette;
+    }
+
+    sal_uInt16 GetPaletteEntryCount() const
+    {
+        const BitmapBuffer* pBuffer = mpBuffer;
+
+        assert(HasPalette() && "Bitmap has no palette!");
+
+        return HasPalette() ? pBuffer->maPalette.GetEntryCount() : 0;
+    }
+
+    const BitmapColor& GetPaletteColor(sal_uInt16 nColor) const
+    {
+        const BitmapBuffer* pBuffer = mpBuffer;
+        assert(pBuffer && "Access is not valid!");
+        assert(HasPalette() && "Bitmap has no palette!");
+
+        return pBuffer->maPalette[nColor];
+    }
+
+    sal_uInt16 GetBestPaletteIndex(const BitmapColor& rBitmapColor) const;
+
+    const ColorMask& GetColorMask() const
+    {
+        const BitmapBuffer* pBuffer = mpBuffer;
+
+        assert(pBuffer && "Access is not valid!");
+
+        return pBuffer->maColorMask;
+    }
+
+private:
+    BitmapInfoAccess(const BitmapInfoAccess&) = delete;
+    BitmapInfoAccess& operator=(const BitmapInfoAccess&) = delete;
+
+protected:
+    Bitmap maBitmap;
+    BitmapBuffer* mpBuffer;
+    ColorMask maColorMask;
+    BitmapAccessMode mnAccessMode;
+};
+
+#endif // INCLUDED_VCL_BITMAPINFOACCESS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */